Merge branch 'Arul-master-patch-24411' into 'master'

Add contributing code file

See merge request docs/developer-guide!14

Documentation/source/contributing-code

+# Contributing Code<a name="EN-US_TOPIC_0000001055088095"></a>
+
+## Start Contributions<a name="en-us_topic_0000001051566732_section123657169441"></a>
+
+**Code Style**
+
+Develop, review, and test code following the OpenHarmony coding standards. Make sure the code is written in the same style.
+
+-   [C++ Coding Style Guide](OpenHarmony-cpp-coding-style-guide.md)
+-   [C Coding Style Guide](OpenHarmony-c-coding-style-guide.md)
+-   [JavaScript Coding Style Guide](OpenHarmony-JavaScript-coding-style-guide.md) 
+-   [Python Coding Style Guide](https://pep8.org/)
+
+## Contribution Workflow<a name="en-us_topic_0000001051566732_section15769105812369"></a>
+
+For details, see  [Contribution Process](contribution-process.md).
+
+## Security Issue Disclosure<a name="en-us_topic_0000001051566732_section725624119448"></a>
+
+-   Security handling procedure
+
+-   Security disclosure information
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